Flint River Reservoir
Dougherty County, Georgia1,400 acresView mapDirections
Georgia EPD publishes the water-quality measurements for Flint River Reservoir. Here is what has been measured.
- Mesotrophic
- 33 ft max depth
- Public access
Flint River Reservoir in Dougherty County, Georgia has water-quality measurements published by Georgia EPD, shown here as reported. Water clarity: 4.3 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 4.8 µg/L. Surface area: 1400 acres.
Flint River Reservoir is a 1,400-acre mesotrophic lake in Dougherty County, Georgia with an estimated average depth of about 33 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 1 other monitored lakes in Dougherty County, Flint River Reservoir ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Georgia EPD, last sampled 2025-10-20. Methodology: how these readings are compared.
What Flint River Reservoir is good for
From access and monitoring records, not editorial picks.
- Big water1,400 acres
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Flint River Reservoir is safe to swim in today is a call for the Georgia Environmental Protection Division and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Flint River Reservoir
These are the measurements Georgia EPD publishes for Flint River Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.3 ft. Phosphorus 30 µg/L. Chlorophyll-a 4.8 µg/L. TSI 52.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 30µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 4.8µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 52 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Flint River Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~33 ft est.
Surface area
1,400 acres
Public access
Yes
Listed by Georgia EPD
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Georgia has not published bathymetry for Flint River Reservoir.
Lake Size & Watershed
Watershed (drainage) area
4,187 sq mi
HydroLAKES / HydroSHEDS
Shoreline
8.3 mi
HydroLAKES / HydroSHEDS
Elevation
203 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
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Stays near Flint River Reservoir
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Fishing Flint River Reservoir
Water Quality Trend: Worsening
Based on 14 years of monitoring (2012–2025).
Water clarity
Stable14 years
Phosphorus
Worsening+1.26 µg/L/yr6 years
Chlorophyll-a
Worsening+0.11 µg/L/yr14 years
Reservoir Info (USACE NID)
Flint River Reservoir is a man-made reservoir impounded by the Flint River (completed 1921), built primarily for hydroelectric on the Flint; gravity-type dam, 60 ft tall and 3,497 ft long.
- Surface area
- 1,400 ac
- Normal storage
- 8,000 ac-ft
- Max storage
- 37,000 ac-ft
- Drainage area
- 5,310 sq mi
- Hazard class
- High
- Owner
- Georgia Power Company
Source: USACE National Inventory of Dams, NID ID GA00835 · Operator website
Nearby Lakes in Dougherty County
Frequently asked questions about Flint River Reservoir
Where is Flint River Reservoir?
- Flint River Reservoir is a lake in Dougherty County, Georgia. Its water-quality measurements are published by Georgia EPD and shown on this page as reported.
What is the water quality of Flint River Reservoir?
- Flint River Reservoir in Dougherty County, Georgia has water-quality measurements published by Georgia EPD, shown here as reported. Water clarity: 4.3 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 4.8 µg/L. Surface area: 1400 acres.
Is Flint River Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Flint River Reservoir?
- No published bathymetric survey covers Flint River Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 33 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 1400 acres.
Can I fish at Flint River Reservoir?
- Public access to Flint River Reservoir is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Georgia's fish and wildlife agency, so check its current regulations before you go.
Explore Flint River Reservoir across LakeQuality
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Mesotrophic Lakes in Georgia
Where this data comes from
478 measurements from 2 monitoring stations, 2012–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Georgia DNR Environmental Protection Division
21GAEPD_WQX478 samples · 2012–2025
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- Turbidity by Nephelometry
- 2120 B ~ Color in Water by Visual Comparison
Monitoring station identifiers (2)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)